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As Marz has suggested - an increase in levo as your TSH is too high for you to feel well. If your GP could add a little T3 i.e. 10mcg, it might help even more.

Some doctors think keeping your TSH within range is right. It's not - we need enough medication to feel well. This is an excerpt below of an article in Pulse Online and you can tell your GP or take a print-out of the recommendations below.

Dr Toft of the British Thyroid Association recommends:-

The appropriate dose of levothyroxine is that which restores euthyroidism and serum TSH to the lower part of the reference range – 0.2-0.5mU/l.

In this case, free thyroxine is likely to be in the upper part of its reference range or even slightly elevated – 18-22pmol/l. Most patients will feel well in that circumstance.

But some need a higher dose of levothyroxine to suppress serum TSH and then the serum-free T4 concentration will be elevated at around 24-28pmol/l.

This ‘exogenous subclinical hyperthyroidism’ is not dangerous as long as serum T3 is unequivocally normal – that is, serum total around T3 1.7nmol/l (reference range 1.0-2.2nmol/l).